Sand-screen eor pumps



S., WOOD.

SAND SCREEN Foa PuMPs.

APPLICATION FILED FEB. 27| |919. f 1 ,3 1 0,686. Patented July 22, 1919.

, l 2 SHEETS-SHEETL 85% www S. WOOD'.

SAND SCREEN FOR PUMPS.

APPLICATION FILED FEB.21. I9I9.

Patented July 22, 1919.

2 SHEETS-.SHEET 2.

me/who@ 'SAMUEL W www mmv PATENT. @NICE SAMUEL Woon, or :eAnKERs LANDINe, rENNsYLvANIA, AssIeNoR or ONE-THIRD 'ro roRATIoN or PENNSYLVANIA.

Yrnrij 'FRANKLIN vALvirLEssnNeINE co., or FRANKLIN, PENNSYLVANIA, A ooit- SANn-scREN Foa rmvrrs.

` To all whom t ma?) concerne." f

Be it known that I, SAMUEL `VooD, citizen of the United States, residing at Park ers Landing, in the county of Armstrong and State of Pennsylvania, have Vinvented certain .new and usefullmprovements in Sand-Screens for Pumps,v of which the followingisa specification.

This invention relates to sand screens fordeep-well pumps, and is' particularly adapted for use in oil-producing wells.

The primary object of this invention is, to provide an inexpensive, simple, and easilyapplied sand screen for pumps, whereby sand and like material may be strained from the fluid that is being pumped, before it passes the piston and enters the barrel, or pump cylinder, thereby protecting said pumping mechanism from the rapid wear and other injurious action, that would otherwise be caused, in 'case said sand were not so eliminated.

Another object of my linvention is, to provide a sand screen that may be easily withdrawn from the well for inspection, repair and cleaning, withoutVV the necessity of also withdrawing the tubing which carries said screen, or with which it coperates.

With said objects in view I have devised the construction shown in the drawings which form apart hereof, the respective figures of which are as follows:

Figure l is a central,'longitudinal section of the preferred form of my device.

Fig.k 2 is an inverted plan view of Fig. l.

Fig. 3 is -a central, longitudinal section of a modified form of my improved sand screen.

Fig. 4 is an elevation of said modified form, together with a vertical section of the lower portion of the coperating barrel in which said screen is operatively mounted.

The construction shown in said Figs. 1 and 2 is substantially as follows:

So far as outward appearance is concerned, this construction is the well-known and commonly-used type of lower or checkvalve with which most oil well pumps are equipped. It comprises the usual elements, consisting of a cage l, the ball valve 2, the reversible valve-seat 3, the barrel or body 4, the resilient suction or packing cups 5,

Ythe collar 6, and the nut 7; said-nut 7 is provided with a conical periphery which A fffSpeciftOll 0f Letters Patent. Patented July 22, 1919. Appicatin niearebnrary 27, 1919'. 'seria1`No.`279,57e. v i

forms a seating face7f which constitutes a plug tocoperateA with the conical seat or `barrel 4, preferably in such a'manner that said disk is retained in position by said valve-seat 3. Said nut 7, instead of being open. at the bottom, as it is in the usual construction, is also provided with a perforated bottom 9, the perforations in which are indicated by the reference numeral l0. Within the chamber of said barrel between said perforated disk 8 and said bottom wall 9, I place any suitable straining material 1'1, such as sponge, which prevents sand and like material from passing through the same with the .actuated fluid, whereby only strained oil is permitted to enter said barrel 13.

This device may be readily removed from the tubing, in the usual manner, and the operation of such removal is well understood to those skilled in the art of operating oil well pumps.

The modified form shown in Fig. 3, is especially adapted to be applied to the usual valve, as it is found upon the market, and may be so applied by simply removing the nut 7 and substituting in place thereof the extension barrel 12, which is provided with an upper 4perforated disk 8 and a lower perforated plug or bottom wall 14. Between said disk 8" and said bottom wall 14 is inserted the straining medium 11, as and for the purpose above stated.

Said extension barrel 12 is formed, preferably near the upper `end thereof into the conical seating portion 7 which is identical in conformation with the corresponding seating portion of the preferred form, and it coperates in the same manner with the conical seat 7 at the lower end of the working barrel, as will be readily seen from an inspection of Fig. 4.

It will be readily noted that, in either form of construction, the barrel which contains the straining material is a portion of the valve structure proper, and is removable from the well in just the same way that such valves are usually removed. Such removal is usually accomplished by screwing the lower, serew-threaded-end of the suckerro'd 15 into the coperating tapped hole in thetop of the cage l, and withdrawing the valve structure from the tubing and well by tion of its periphery formed to coperate.

with said seat, and to removably occupy the same, a perforated closure at Veach end o f the chamber of said tubular structure, andV a suitable straining medium within said chamber.

2. A sand screen for pumps comprising 1n combination, a worklng barrel, annu-` lar seat within and adjacent to the lower end of said barrel adapted to coperatewith and to carry a checkevalve structure, a check valve structure adapted to be carried by and readilyremovable from said seat', said valve structure having as Va feature thereof a chamber through which the fluidwpasses to enter said barreha straining medium in said chamber,V and means for retaining said medium within said chamber, y s t In testimony whereof I aiiix my signature" in presence of two witnesses,

Y SAMUEL woop. IVitnesses: v i

C. D. ALLISON,l FANNIE M. KELLY.

Copies o f this| patent may be obtained for five.y cents each, by .addressing the Commissioner of iatents,

Waghington, D. G. t f 

